Physicochemical Properties of Peptide



PPepDB ID:PPepDB_889
Number of amino acids:241
Molecular Weight:26083.65 Da
Theoretical pI:8.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.47%
Cysteine CYS (C)166.64%
Glutamic Acid GLU (E)93.73%
Aspartic Acid ASP (D)93.73%
Glycine GLY (G)239.54%
Phynylalanine PHE (F)177.05%
Isoleucine ILE (I)83.32%
Histidine HIS (H)20.83%
Lysine LYS (K)135.39%
Methionine MET (M)41.66%
Leucine LEU (L)145.81%
Asparagine ASN (N)187.47%
Glutamine GLN (Q)62.49%
Proline PRO (P)177.05%
Serine SER (S)177.05%
Arginine ARG (R)93.73%
Threonine THR (T)187.47%
Tryptophan TRP (W)31.24%
Valine VAL (V)135.39%
Tyrosine TYR (Y)72.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1149
HydrogenH1754
NitrogenN312
OxygenO344
SulphurS20

FormulaC1149H1754N312O344S20
Total Number of Atoms:3579


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27930
Absorption 0.1% (=1 g/l)    1.071,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.032,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.73, 31.12, 18.67]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:58.7137
Grand average of hydropathicity (GRAVY):-0.20